Stream: Archive Mirror: Isabelle Users Mailing List

Topic: [isabelle] Isabelle2018-RC0: Confusing cursor behavior wi...


view this post on Zulip Email Gateway (Aug 22 2022 at 17:31):

From: Dominique Unruh <unruh@ut.ee>
Hi,

Given a term of the form:

val _ = \<^term>‹123›

which looks like

val _ = term‹123›

it is confusing to navigate through it via (e.g.) ctrl-left. For example if
the cursor is on 123, and I push ctrl-left until the cursor is at the
beginning of term, and then I press backspace, I would (given the
visuals) expect the space to vanish. Instead, term becomes \<term> (the ^
goes away). This is logical given that term is actually \<^term>, but
since it is not visually represented that way, I would expect ctrl-left to
jump before the \.

I don't know anything about jEdit interna, so perhaps this is very hard to
change. But if it can be changed, I think editing would be smoother if
term were interpreted as a single word for the purpose of ctrl-left,
ctrl-right.

Similar problems happen when highlighting term via a doubleclick.

Best wishes,
Dominique.

view this post on Zulip Email Gateway (Aug 22 2022 at 17:42):

From: Makarius <makarius@sketis.net>
The editing mode provides a proper noWordSep for characters that should
be treated like letters for certain word-oriented operations (including
doubleclick selection).

I have changed that for the next Isabelle2018 release candidate, see
https://isabelle.sketis.net/repos/isabelle-release/rev/2e31887d9664

That means \ < ^ > will be treated as word consituents. Consequently,
the following will be a single word:

\<^term>
\foobar
abc<xyz
abc^xyz

The latter two occur within the term language (or ML) as infixes, but
normally there is space around that.

Makarius

view this post on Zulip Email Gateway (Aug 22 2022 at 17:51):

From: Makarius <makarius@sketis.net>
I have now published Isabelle2018-RC1 without looking at this again, but
I will do so before the final release.

Makarius


Last updated: Nov 21 2024 at 12:39 UTC